Answer:
Two diverged populations are capable of mating and producing viable and fertile offspring.
Explanation:
Although the biological concept of species says that two different species can not mate and produce viable fertile descendants, the hybrid zones are characterized for being an area where two different genetically groups meet and reproduce. These groups might be the same or different species.
This is a frequent phenomenon in nature, and widely common geographically and among taxonomic groups. It is not rear that different sympatric populations, with a short time of divergence and similar reproductive strategies, can hybridize and even generate new populations that get reproductively isolated from their parentals.
When talking about sympatry we refer to two similar species that coincide in part or their whole distribution area.
These new populations are even morphologically different from the parental forms, which allow them to colonize new habitats and niches, promoting diversification.
Hibridation zones are very important to conserve, just because they are points of genetic diversity generation and diversification areas.
When the ranges of two different species meet, a stable "hybrid zone" occupied by hybrid individuals can form. This is possible because hybrid individuals are always allopolyploid and therefore are unable to mate with any of the original species, to understand more we need to know that......
Hybrid animalsHybridization, that is, the process through which different species reproduce, generating an offspring, is not considered a very common phenomenon in nature. This is because, in general, species have a distinct number of chromosomes, the cell structures that contain genes. These differences in the number of chromosomes can make the development of the embryo unfeasible, as the alignment of equivalent chromosomes from the female and the male are necessary for the division of the fertilized cell to occur. When this alignment does not occur, the cell does not reproduce and dies. However, in some cases, even with the lack of chromosome pairs, reproduction between different species is successful, generating the hybrid. However, the birth of the individual does not mean that its survival is guaranteed. Often, the hybrid generated is weaker than its parents and does not survive; in other cases, the hybrid can adapt better to the environment than the species that conceived it.
With this information, we can conclude that hybrid animals are a cross between two different species, but this hybrid can have several complications for its survival.
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John and Joshua used a light microscope to observe a plant cell. They indicated the magnification as x1000. Given the eye piece lens magnification x10. Work out the objective lens magnification.
Answer:
Objective Lens Magnification = ×100
Explanation:
In a microscope, the ocular (eyepiece) lenses are usually to a magnification of ×10, meaning that it magnifies the image 10 times. While the standard objective lenses have magnifications of ×4, ×10, ×40, and ×100.
In order to work out the total magnification, the individual magnifications of the ocular and objective lenses have to be known, after which a simple multiplication of both magnifications will give the total magnification used.
Total Magnification = (eyepiece lens magnification) × (objective lens magnification)
1000 = 10 × obejcetive lens magnification
Dividing both sides by 10
Objective lens magnification = 1000 ÷ 10 = 10
∴ Objective lens magnification = ×100
The notion that the traits that help a species survive and reproduce are passed along more frequently than those that do not (i.e. differential reproduction and adaptation) is known as
Answer:
Natural selection
Explanation:
According to Darwin's theory, natural selection is the process by which individuals better adapted to their environments have more chances to survive and reproduce, and thereby their descendants will be better represented in the next generation. This mechanism exploits the existence of natural variation among members in the population which is used to select those individuals that are better adapted (i.e., with a higher adaptive fitness) for their environments. Natural selection is a key mechanism of evolution by which species change across time.
The process whereby the earth’s life changes over time through changes in genes of populations of organisms in succeeding generations is called____.a. emigration.b. mutation.c. natural selection.d. evolution.e. genetic drift.
Answer:
The correct answer is option : d. evolution.
Explanation:
Change in the heritable traits or characteristics of population of a organism over time by the adaption or changes in genes of such population over successive generation is known as the evolution.
These changes that cause the evolution of the biological population is caused by the process of adaption through natural selection that is the ability of the passing beneficial genes from parent to offspring.
Thus, the correct answer is option D. evolution.
Explain Fo- F1 pump in mitochondria?
Please
I will mark you the brainlest
mitrochondrial Proton FOF1 ATPase / ATP synthase synthesis ATB during oxidative phosphorylation. In this study, we examined of effects of several groups of polyphenolic photochemicals on the activity of the enzyme
Answer:
ATP sinus is enzyme that creates the energy storage molecules adenosine triphosphate ADP and inorganic phosphate the overall reaction catalysed by ATP synthesis is
ADP+Pi+3H+out =ATP+H2O+3H+in
Compare the characteristics of nitrogen fertilisers that are used for
broadcasting with a phosphate fertiliser that is insoluble in water??
Answer:
Nitrogen is mobile while phosphorus is immobile in the soil.
Explanation:
Nitrogen fertilizers are those fertilizers which provide nitrogen to the plants that is required by plants for the formation of amino acids. It increases vegetative growth of plant. Nitrogen fertilizer is highly mobile due to soluble in water and contaminated the underground water by leaching while phosphorus fertilizer are those fertilizer which provide second macro-nutrient i. e. phosphorus to the plants. Phosphorus is a vital component of energy molecule such as ATP. It is insoluble in water so it is immobile. Only 20 % of the applied phosphorus fertilizer is available to plants.
answer answer answer answer
Answer: C
Explanation: Amoeba use pseudopods to move around and people use feet to move.
Answer:
The answer is C
PLEASEEE HELP!!! Can someone please help me with this question
Answer:
The answer is
Explanation:
The particle is a virus because it has genetic information and can infect humans.
Hope this helps....
Have a nice day!!!!
Answer:
A
Explanation:
Watch the video “Teen Stress.” Now, imagine that a friend confides in you that he is going to the doctor because he feels that stress might be affecting his blood pressure. He wants you to help him develop a list of questions to ask the doctor. Come up with five questions for your friend to ask about stress and blood pressure.
Answer:
questions:
Should I or can I eat salty foods?
Do I have to check my pressure immediately?
Do I have to follow a balanced diet?
Is it good to do physical activity?
Do I have to worry about the signs of eye flickering and headache?
Explanation:
Blood pressure is regulated by endogenous mechanisms, although these sometimes fail and it is necessary to take drugs to reduce high blood pressure, an example of which is beta-blockers.
Blood pressure is also regulated by diets based on low sodium consumption, necessary calories and with great contributions of nutrients since cardiac or cardiovascular health is also essential in the face of possible formation of atheroma plaques.
The increase in blood pressure with the appearance of atheroma plaques is very common, and it is also the two most frequent causes of AMI (acute myocardial infarction)
Answer:
1)How much does blood pressure rise because of stress?
2)Are there techniques that I can use to cope with stress?
3)Do these techniques help to reduce blood pressure?
4)Is exercise helpful in reducing blood pressure caused by stress?
5)Would medication help my condition?
6)Are there any other risk factors for high blood pressure?
Explanation:
Answer from plato.
please help!!
What are some factors that influence emotional changes throughout adolescence?
Answer:
Explanation:
Some of the factors that influence emotional changes during adolescence include, among others, changes in self-perception, changes in the way teens are treated, increased sensitivity to criticism, increased desire for independence, and an increased need to belong.
Which of the following is composed of a population of a species plus populations of other species? A. Community B. Biotic Potential C. Abiotic community D. Ecosystem
A Community is composed of a population of a species plus populations of other species. Thus, the correct option is A.
What is Population?A Population may be defined as a group of individuals belonging to the same species living in the same area at a given time. Some demographic characteristics of a population are size, density, birth rate, death rate, population dispersal, etc.
A community may be defined as a group of individuals belonging to different species living in the same area at a given time.
An ecosystem may be defined as a place or area where individuals of different species along with abiotic factors live together and interact with one another for the purpose of food, shelter, and space.
The Abiotic community deals with the existence of abiotic factors like temperature, rainfall, fire, winds, mountains, hills, etc.
Therefore, a Community is composed of a population of a species plus populations of other species. Thus, the correct option is A.
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For each of the following types of transcriptional control, indicate whether the protein produced by the regulator gene will be synthesized initially as an active repressor, inactive repressor, active activator, or inactive activator.a. Negative control in a repressible operonb.b. Positive control in a repressible operonc.c. Negative control in an inducible operond.d. Positive control in an inducible operon
Answer:
The type of protein synthesized for each case of transcriptional control is given below:
a. Negative control in a repressible operon
Inactive repressor
b. Positive control in a repressible operon
Active activator
c. Negative control in an inducible operon
Active repressor
d. Positive control in an inducible operon
Inactive activator
Explanation:
Different types of operons exist in different bacterial systems and they control the transcription of genes by means of regulator proteins. These proteins are responsible for turning on or off the gene encoding a particuar protein depending on whether or not the cell requires for it.
2 Describe why it would be an advantage for the seeds to be able to grow at any angle
Answer:
Seed grow at any angle is good for the plant because the barrier did not stop the plant growth.
Explanation:
If we planted a seed in the soil and there is any barrier such as stone or brick etc inside the soil so the roots change its direction because the seed grows at any angle. The shoot that emerge from the seed grow in upward direction if the stem is strong but some plants also grow horizontally due to weak stem so it is not compulsory for the plant to grow in only one direction, it grows whatever they want.
1.What factors define aquatic ecosystems?
Answer:
In other words, physical or chemical parts of the environment that affect the organisms that are in that environment.
Explanation:
For aquatic ecosystems, these factors include light levels, water flow rate, temperature, dissolved oxygen, acidity (pH), salinity and depth. Light level is an important factor in aquatic ecosystems. hope this helps you :) god loves you :)
Light level is an important factor in aquatic ecosystems.
The physical or chemical parts of the environment that affect the organisms that are in that environment.
What is aquatic ecosystem?An aquatic ecosystem is a water-based environment. Abiotic factors are the non-living components that form the environment in which organisms subsist in a current.
The main abiotic factors in the marine environment are as; light, temperature, salinity, and hydrostatic pressure. dissolved oxygen, acidity (pH), salinity and depth.
Here Without pollution or acid rain, most lakes and streams would have a pH level of around 6.5.
Therefore Light level is an important factor in aquatic ecosystems.
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List out the names of some
plants that grow in your village.
Which parts of it are used as
food?
Answer:
Explanation:
The plants grown in my place are - rice, groundnut, sugarcane, grapes, mulberry, castor, ragi etc.
Parts of it used as food
rice - seed
groundnut - seed
sugarcane - stem
grape - fruit
Mulberry - fruit
Castor - seed
ragi - filler millet
Hope this helps
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Arctic sea ice has declined over the past few decades causing water levels to increase. This is an interaction of which two spheres?
Answer:
Cryosphere and Hydrosphere
Explanation:
The Cryosphere refers to the frozen water bodies on earth. This includes glaciers, icebergs, ice sheets and frozen water surrounding the Arctic and Antarctica.
The Hydrosphere refers to all the water bodies on Earth, including rivers, streams, lakes, and ponds.
Answer:
Cryosphere and Hydrosphere
Explanation:
YOUR WELCOME
In humans, the quadriceps muscle is a skeletal leg muscle under voluntary control. As such, it contracts in response to signals from the motor cortex in the cerebrum. If such a muscle contracts involuntarily, that indicates:
Answer:
The correct answer is - operation of reflex arc.
Explanation:
The reflex arc is a unique and special type of neural pathway that starts with a sensory neuron and ends with a motor neuron. In this operation sensory neuron acts as the receptor and motor neuron is effector. This type of neural circuit helps in faster response.
Voluntary muscles like quadriceps muscle are normally in control voluntarily however, such muscle may contract involuntary due to reflex arc. This type of contraction takes place before the signal has even reached the brain.
In this response the sensory neuron takes the signal to the spinal cord and then motor neuron to the effector muscle for faster response.
Thus, the correct answer is - operation of reflex arc.
what are top consumer
Answer:
it is a food chain.
I can't write more it's not allowed
Please help for the 4 and 5 question in the picture above.The person answering both part of question 4 and 5 will be marked as brainliest. I promise.The subject is hindi but there is no option so I opted for biology.but pls help.
Answer:Am really sorry...I wanted to help you but I cannot understand Hindi
Explanation:
I really hope you get an answer
What do you think that David would have predicted
based on his hypothesis? (Set it up as an IF
THEN statement)
Answer:
Hey there!
I believe that David's prediction would be: If the amount of pollutants in the atmosphere reached an amount unhealthy for the salamanders, then the salamander population would decrease.
Let me know if this helps :)
11. By what process do streams and rivers move material?
O infiltration
O mass wasting
O erosion
O weathering
Erosion is the process by which Earth's surface is worn away by the action of water, wind, ice, or gravity. Hence option C is correct.
Streams and rivers are agents of erosion, and they move material by a variety of processes, including:
Dissolution - The water in a stream can dissolve minerals from the rocks and soil that it flows over.
Suspension - Fine particles of sediment can be suspended in the water and carried downstream.
Traction - Larger particles of sediment can be rolled or bounced along the bottom of the stream.
Saltation - Small pebbles and stones can be bounced along the bottom of the stream.
The type of erosion that a stream or river causes depends on the size of the particles that it is carrying. Streams and rivers that carry a lot of fine sediment are called suspended-load streams. Streams and rivers that carry a lot of large particles are called bed-load streams.
Erosion by streams and rivers can have a significant impact on the landscape. It can create valleys, canyons, and deltas. It can also transport sediment to other areas, where it can be deposited and form new landforms.
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ANP is a hormone that causes:_________ a. constriction of the afferent arterioles and inhibition of renin release. b. dilation of the afferent arterioles and inhibition of renin release. c. dilation of the afferent arterioles and release of renin. d. constriction of the afferent arterioles and release of renin.
Answer:
b. dilation of the afferent arterioles and inhibition of renin release.
Explanation:
Atrial Natiuretic Peptide is a hormone which is mainly made and secreted in the atria. It helps in the regulation of blood pressure levels with the use of the kidney through an increase in water and sodium excretion.
The hormone helps in the regulation of blood pressure by ensuring there are dilation of the afferent arterioles to give room for increased flow of blood due to the increased pressure. Study also shows that the enzyme inhibits the release of renin.
Imagine an invertebrate that lives in an estuary where salinity varies cyclically with the tides. If this individual is able to adjust the salt concentration of its body fluids, its salt concentration will have:____. a. a cyclic variation depending upon when the animal drinks. b. regular variations that range from large to small. c. slight fluctuations that are kept within a narrow range. d. a cyclic variation opposite that of the surrounding water.
Answer: Option C.
slight fluctuations that are kept within a narrow range.
Explanation:
An invertebrate that lives in an estuary where salinity varies cyclically with the tides. If this individual is able to adjust the salt concentration of its body fluids, its salt concentration will have slight fluctuations that are kept within a narrow range so has to maintain homeostasis and prevent the cells of the the invertebrate from not shrinking which can be due to the salt solution (Hypertonic).
Estuary is an area of water or shorelines where river meet the ocean. It normal do have concentration of salts. Organisms that live in estuaries must be able to adapt to their dynamic environments, wich is due to variations in water chemistry includes salinity, as well as physical changes like the rise and fall of tides.
A key component in the formation of organic compounds, such as nucleic acids and ATP
The correct answer is Phosphorus I just took the test.
A recent viral video entitled "How Wolves Change Rivers" argues that the reintroduction of wolves to Yellowstone after a 70 year absence led to multiple changes in the biodiversity and ecology of the park. This is an example of a(n)
The options are missing from the question,below are the missing options;
a. Trophic cascade
b. Primary succession
c. Autograph
d. Eutrophication
e. Pioneer community
The correct answer to the question is option A.
TROPHIC CASCADE.
Trophic Cascade occurs when there is a series of significant difference/changes in the population size of organisms in the tropic level of an ecosystem.this change in trophic level occurs in a food chain and as a result of predators being in high trophic levels, they use the opportunity to indirectly promote the population of the organisms in the low trophic levels,they do so by ensuring that species that are at intermediate trophic levels are are in close watch or check.
This corresponds with the viral video of of how wolves change rivers featuring
the reintroductionn of wolves to Yellowstone after a 70 year absence which led to multiple changes in the biodiversity and ecology of the park.
what is the meaning of plasmolysis
Answer:
. when a living plant cell loses water by osmosis , there is a contradiction or shrinkage of the components of the cell away from the cell wall . This phenomenon is known as plasmolysis . for example :- red blood cells shrink when placed in a salt solution .
Explanation:
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Explain how Darwin’s theory of evolution by natural selection may have led to all giraffes having long necks.
Answer:
Because this individual had a longer neck, it was able to reach food sources that other animals couldn't...
please give the correct answer to this question
Answer: Lymphatic system
Explanation:
Not respiratory and excretory for sure.
Not nervous because the diagram doesn't show spinal nerves clearly. So its lymphatic system.
:-)
why is it necessary yo separate oxgynated and deoxgynated blood in livng oranisum
Explanation:
it is necessary in mammals and birds to separate oxygenated and deoxygenated blood because this makes their circulatory system more efficient and helps in maintaining a constant body temperature
A scientist thinks that a certain chemical is a mutagen. She exposes plant cells to a large amount of this chemical in the laboratory. Which statement best provides evidence that the substance is a mutagen? -The cells die within hours of being exposed to the chemical. -The cells grow more quickly than those that were not exposed to the chemical. -The cells change after being exposed to the chemical, and this change is passed to the next generation of cells. -The cells continue to divide at the same rate as before they were exposed to the chemical.
Answer:
The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.
Explanation:
Mutation is a process that occurs from time to time to the genetic material of living cells. Mutation is a change in the nucleotide sequence of a DNA or gene. It is usually caused by errors during replication or induced by an external substance called MUTAGEN.
A mutagen is any substance that causes mutation in an organism. Hence, according to the question, the chemical substance which is thought to be a mutagen will change the cells after being exposed to the chemical, and this change is passed to the next generation of cells.
N.B: Since mutation affects the gene, it is passed on to the offsprings during reproduction.
Answer:
its c did the test
Explanation:
Climate change is a threat to polar bears and other species that thrive on sea ice. Melting sea ice and changing precipitation patterns impact the bears’ ability to hunt and survive. In the past few decades, the number of polar bears in the Arctic region has dropped considerably. How might humans help to save these species?
Answer:
c.
Explanation:
Breed Polar bears in captivity , and then release them in the colder areas.
The colder the area the less of a chance there would be for the ice to melt fast enough sweeping away the bears shelter.
Climate change is the long-term alteration in weather patterns. It impacts the polar bears of the arctic region that can be saved by breeding them in captivity and then releasing them into their natural habitat.
What is the impact of climate change?Climate change is the pattern of the disturbance in the weather and the temperature condition of the earth and its various places. It is a result of increased global warming caused by pollution.
Climate change affects the oceans and sea by raising their temperature leading to the melting of the ice caps and glaciers. This results in habitat destruction and decreases the population of arctic animals like polar bears.
To increase the population of polar bears, humans can breed them in an artificial environment and then can release them into their natural habitat like the colder places.
Therefore, the population can be increased by breeding.
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